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Difference Between Petrol engines and Diesel engines

Petrol engines vs diesel engines

When they need to buy a vehicle, people are often confused as to what type of vehicle they should buy. They find it difficult to choose between petrol and diesel-engined vehicles.
The first thing to note is that diesel engines cost more than the petrol engines. Also, vehicles fitted with diesel engines have to undergo more frequent maintenance than vehicles with petrol engines.
One of the main differences between a diesel engine and a petrol engine is in the fuel ignition. In a diesel engine, there is compression ignition and in a petrol engine, spark ignition. In diesel engines, the ignition takes place through compression. The fuel is infused into the cylinder at high pressure that causes the burning of the fuel.  In a petrol engine, a spark ignites the air/fuel mixture, which runs the pistons.
A vehicle running on diesel will make more noise than a vehicle running on petrol. An advantage of petrol engines is that they run faster than diesel-powered vehicles. This is because petrol engines are not as heavy as diesel engines.
Diesel engines have a longer life than petrol engines because the latter  use up lubrication more quickly.
Vehicles fitted with diesel engines are more fuel-efficient than vehicles fitted with petrol engines. Moreover, diesel engines also have the advantage of easier turbo charging than petrol engines. As diesel engines consume less fuel than petrol engines, diesel-engined vehicles are more eco-friendly. Also, unlike petrol engines, diesel engines do not emit carbon monoxide.
Another noticeable difference between diesel engines and petrol engines is in the torque. Diesel engines have higher torque than petrol engines, which means that vehicles fitted with diesel engines can pull more loads.

Summary

  1. In diesel engines, compression ignition occurs and in petrol engines there is spark ignition.
  2. Diesel engines are more expensive than petrol engines.
  3. Diesel engines have a longer life than petrol engines because the latter use up  lubrication more rapidly.
  4. Diesel engines do not emit carbon monoxide as petrol engines do..
  5. The torque of diesel engines is higher than in petrol engines, which means that vehicles fitted with diesel engines can pull more loads.

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